pls help me solve a & b

What would be the net annual cost of the following checking accounts? (a) Monthly fee, $4.50; processing fee, $0.10 cents per check; checks written, an average of 15 a month. Note: Do not round intermediate calculations. Input the answer as a positive value. Round your final answer to 2 decimal places. (b) Interest earnings of 6 percent with a $500 minimum balance; average monthly balance, $700; monthly service charge of $22 for falling below the minimum balance, which occurs three times a year (no interest earned in these months). Note: Do not round intermediate calculations. Input the answer as a positive value. Round your final answer to 2 decimal places